Transmitter.



No. 702,75l.

Patented lune l7, I902. A. VAN WAGENEN.

TRANSMITTER.

(Application filed Mar. 21, 1901.)

Sheet I.

(No Modql.)

! ATTORNEYS UNITED STATES PATENT" OFFICE.

ANTHONY VAN WAGENEN, OF SIOUX CITY, IOWA.

. TRANSMITTER.

sPEcIFIoATIoN forming m of Letters Patent No. 702,751, dated June 17, 1 e02. Applicationilled March 27, 1901. Serial No. 53,035. (No model.)

To all whom it may concern;

Be it known that I, ANTHONY VAN WAGE- NEN, a citizen of the United States, residing at SiouxOity, in the county of Woodbury and State of Iowa, have invented certain new and useful Improvements in Transmitters; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in transmitters, and particularly to improvements in instruments designed for use in connection with systems of electrical interc'ommunication, such as automatic telephone-exchange systems.

My invention consists in th'e novel and improved construction of the transmitter, as hereinafter more fully pointed out.

The objects of my invention are to improve and simplify transmitters, and particularly those of the type mentioned, and to render anism the same durable, free from liability to de rangement, comparatively inexpensive, and

easily operated by inexperienced persons These objects are attained in the invention herein described, and illustrated in the drawings which accompany and form a part of this specification, in which the same referonce letters and numerals indicate the same or corresponding parts, and in which Figure 1 is a front view of my improved transmitter with the case inclosing the mech-' anism of the instrument sectioned, so that the dial, which forms a portion of said case, is absent. Fig. 2 is a detail view of a portion of this dial. Fig. 3 is a central vertical section, on a plane at right angles to that of Fig. 1, of the instrument. Fig. 4 is a detail side elevation, taken from the right of Fig. 1, of'the two main spur-wheels and their pawls. Fig. 5is a side elevation of the mechinverted, showing particularly the chain of gearing'which governs the speed of the'main shaft. Fig. 6 is a detail view of this chain of gearing, and Fig. 7 is a detail view of the locking-piece 2 and its pawl lat.

The transmitter herein described belongs to that class wherein a dial is provided upon which are marked a series of numbers or other designations,the instru menthavin g also a suitable pointer or other indicator, which terial.

may 'be set to any one of said numbers or designations, and the mechanism of the instrument being such that when the .said

pointer. or other indicator is so set and the instrument is operated an electriocurrent controlled by the instrument is operated (as by making and breaking it) a number of times corresponding to theposition to which the pointer or other indicator has been moved,

suchoperation of the 'circuit'sufficing to operate in like manner a switchboardinstrument or receiving instrument, an d when the said pointer or other indicator has been moved to zero again or is permitted to move to zero .thedesired signal, as indicated by the pointer, has been sent, after'which' the operation of a releasing de viceas, for instance,by replacing the receiver on its hookcauses the pointer to go toz ero again. I '4 In the drawings, a is a base of suitable ma- To-it is secured a plate 22, forming the bottom of the case inclosingthe main portion of the mechanism of the apparatus, Pillars d project outward and a frame-plate e connects them. The central shaft f has a bearing on plate I).

g is a case inclosing the main portion of the apparatus. Its front face may bedivided into a series of numbered or otherwise designated spaces, as shown in Fig, 2. r 1

Upon the shaftf, loosely mounted,'is a bushing h, and upon and secured to thebushing h, but outside'of the case g, is ,-a pointer 'L. To bushing 71. a dial-wheel It is likewise secured. Said wheel has on its periphery a series of notches the number of which corresponds to the number of spaces into which the dial is divided. Functionally the dialwheel is a part of the indicator or pointer, its principal uses being to serve as a means ICO whereby the pointer may be locked in different positions in which it may be set and whereby the contact-wheel may be arrested when it reaches normal position with respect to said indicator or pointer. Beneath the said dial-wheel there is a contact-wheel Z, having teeth and spaces corresponding to those of the wheel L. The wheel Z is secured to the shaftf, and to it is attached a pawl m, engaging a ratchet-wheel n, loosely mounted upon said shaft. A spring 0 is connected at one end to a fixed portion of the apparatus and at the other end to a pinion 19, itself connected to the ratchet-wheel n. A rack-bar g,- adapted to slide in guides r and .9, supported by the frame of the instrument, engages pinion p. WVhen the rack-bar q is pressed i11- ward, the spring 0 is wound up, the pawl 'm permitting, the ratchet-wheel n to turn freely; but when the rack-bar is released the spring can unwind only by the rotation of the contact-wheel Z, the pawl m causing the wheel Z to turn with pinion 29.

At one side of wheels 7t and Z is a spindle t, rotatively mounted. This spindle carries a pawl u, formingastop-pawl for the dial-wheel k and adapted to enter any of the various notches in the periphery of said wheel. To said spindle there is secured a linger n, which the rack-bar q encounters when pressed inward to the fullest extent. Since the pawl u and finger 'v are both attached to the spindle '6, they are substantially one, and when the rack-bar q encounters the finger 'u it moves pawl u out of engagement with the dial-wheel it against the tension of the spring 20. The wheel Z is provided on its upper side with an upwardly projecting piece 3;. The upper wheel 7c is provided with a corresponding downwardly-projecting piece y. The wheel Z is further provided on its underside with a further projecting piece or pin 2', which is engaged normally by locking-piece 2, likewise secured to the spindle t and forming substantially, with pawl u, an escapement lever or detent, the position in which wheel Z is thus held stationary normally corresponding to the zero position of the pointer.

The frame of theinstrumentsupportsa contact-brush 3,adapted to make contact with the teeth of the wheel Z successively as the latter rotates and insulated from the frame, and to this brush is connected a wire at of the circuit to which the instrument is connected, the other wire 5 being connected to the baseplate I) and so to the mechanism of the apparatus.

WVhen the transmitter is used in connection with a telephone system, it will be used for operating a central switchboard instrument to make connections with subscribers telephones. In such case each transmitter will contain a receiver-hook G, pivoted to a suitable support 7, and from which a receiver 8 (shown in dotted lines in Fig. 1) may be hung in the ordinary manner. Such hook may be held elevated, when the receiver 8 is not hanging from it, by aspring 9. The rear extension 10 of this hook may have secured to it a tripping-piece 11, adapted to engage a projecting lip 12 of the locking-plate 2.

In the operation of the instrument the pointer Z is set at the desired, position on the dial and the rack-bar q is pressed inward to the fullest extent, so that it encounters the finger o and so pushes the pawl it away from the wheel 7.: and pushes the locking-plate 2, then in engagement with the pin a, upwardly slightly, so as to release the tripping-piece 11, which has been in a curved position, having been held in such position by the hook-shaped lip 12 of the locking-plate 2. Said spring tripping-piece then springs out from under said lip into the position shown in dotted lines in Fig. 1. lVhen the pressure on the button at the end of the rack-bar is relieved, the pawl a, being pressed in by the spring w, engages the wheel It), so as to lock it and the pointer in the position to which the pointer has been set. The locking-plate 2 at the same time releases the pin .e'and wheel Z, and the latter begins to turn under the influence of spring 0 and continues to turn until its pin encounters the pin 7 of the wheel 7t. As each tooth of the wheel Z encounters brush 3 it completes an electric circuit through wires 1 and 5, which circuit is broken when that tooth breaks contact with the brush. Rotation of the wheel Z therefore transmits through the line a number of current impulses corresponding to the number of teeth of said wheel which pass the brush Therefore when the wheel Z is arrested byits pin cc encountering the pin y the call indicated by the position of the pointer has been sent in. After the rack-bar g has been released, as above described, after the setting of the pointer the receiver 8 may be removed from its hook, and after the buzzing noise caused by the operation of the regulating-train of gears, hereinafter mentioned, and by the passage of the brush 3 over the teeth of wheel Z has ceased, indicating that the desired connection has been made, conversation may begin. By the upward movement of the hook 6, caused by the removal of the receiver, the tripping-piece 11 is moved under the lip 12 01. the locking-plate 2. lVhen the receiver is returned to its hook upon the conclusion of the conversation, the lever G will be depressedandthetripping-piece 11 willbe raised, and the latter in rising will engage the lip 12 of the locking-plate 2 and lift said plate, and in rising said plate will move the pawl u out of engagement with the dial-wheel It, thereby releasing both said dial-wheel and the contactwheel Z and permitting them to turn until the pin a on the contact-wheel Z encounters the lip 13 of the locking-plate 2. As the trippingpiece 11is thus raisedit willalso be sprunginto the curved position shown in Fig. 1, because one end of the tripping-piece 11 is held by the lip 12,while the otherend,beingfirmlysecured to the portion 10 of the receiver-hook 6, is car IIO ' ried by the latter in acurved path. The vtrip- When the transmitter is not to be used in an ping-piece is thereby; given the tension .re-. quired to enable it to" spring out and away ing-plate 2 it encountersa hinged pawl 14,

ing-plate and movable with respect thereto, and having'a spring 15 which presses it upward. When the pin a. encounters this hinged pawl 14, it presses it outward, and when the said pin has passed the pawl 14 the spring 15 causes the latter to rise behind the pin .2 and so prevent rebound thereof and of the wheel Z. In the movement of the contactwheel Zwhich occurs while the pointer t' is returning to zero the circuit of the instrument is completed and broken again a sufficient number of times to restore the automatic switchboard instrument to zero again.

automatic telephone system,the lever 6 may ,be operated by hand, or any other suitable releasing device for operating the lockingplate 2 may be employed. It will thus be observed that in the operation .of the instrumentthe signal-transmitting mechanism cannot be released and the desired signal transmitted until the rack-bar g has beenpressed in to the farthest limit of its movement. This insures full tension of the spring for each operation. I

The regulating-train of gears by which the speed of shaft f is controlled is of simple character. It consists of a gear 16, inter-meshing with a pinion 17, to whichis'connecteda gear 18, intermeshing with a pinion 19, to which latter pinion is connected an escapementwheel 20, engaged by an escapement-lever 21. Upon the shaft of this escapement-lever there The operation of is a small pendulum 22.

such a regulating-train is Well known and need not be particularly described.

The receiver-hook may operate contactpoints of the telephone-circuit in the ordinarymanner, and for that reason should be insulated from thecircuit-varying mechan-.

ism of the instrument. I do not show contact-points operated by the receiver-hook, as such contact-points form no part of my present invention, but I show the receiver-hook insulated from the circuit-varying mechan-.

This may be accomplished in various- Asshown in the drawings, that por-- forming substantially a portion of the lock- It is held in place by screws 26 26, insulated from said section 24. But I do not limit myself to this particular method of insulating the receiver hook from the circuit-varying mechanism.

vention, what I-c1aim, and"desire to secure by Letters Patent, is-- 1. In a transmitter, the combinationpwith circuit-varying mechanism having an operating member movable in a prescribed path, I

and an indicator adapted to arrest the movement of such operating member at diiferent stages of its movement, according to the position of the indicator, of a releasingdevice adapted to release such operating member when so held,'and means operated independ- 'ently. of theoperation of the indicator for driving such operating memben 2. In a transmitter, the combination, with stages of its movement, accordingto the position of-the indicator, of a releasing device ently of the operation of the indicator fo driving such operating member.

circuit-varying mechanismhavingarevolu-ble operating member, and an indicator-adapted; to arrest such operating member atdilferenu r adapted to'release such operating'member, when so held, and means operated ind'epend- 3 Ion" j 4. In a transmitter,.the combination, wan circuit-varying mechanism having a revoluble operating member, an indicator, and means" operated thereby adapted to arrest'suc'h operating member at different stages of its move-- ment, according to the position of theindi'c'ator, of a releasing deviceadapted to'relea'se, i

'such operating member when so-.held, and

'IIO'. driving such operat means operated independently of the operation of the indicator for ing member.

5.;In a transmitter, the combinationgwith' a circuit-varying mechanism, having an 'o'perating member movable in a prescribed path,

hand-operated power-storing mechanism for driving-said operating member, an indicatormovable independentlyof said power-storing mechanism provided with means wherebynit 1 may be held in different positions, and means operated by the indicator'for-arresting said operating member at different stages 'of-its' movement according to the position'of the indicator, of a locking device for holding the indicator in predetermined positions in which it may be placed, means operated by said power-storing mechanism when power has been stored therein to the full (impart: causing said locking device tolock the indicator and for releasing the saidoperating member, and a releasing device adapted to release the indicator, when so locked,'thereby permitting the operating member and indicator to return to theirinitial positions.

&

6. In a transmitter, the combination, with circuit-varying mechanism having a revoluble operating member, hand-operated powerstoring mechanism for driving said operating member, an indicator movable independently of said power-storing mechanism provided with means whereby it may be held in different positions, and means operated by the indicator for arresting said operating member at different stages of its movement, according to the position of the indicator, of a looking device for holding the indicator in predetermined positions in which it may be placed, means operated by said power-storing mechanism when power has been stored therein to the full extent, for causing said locking device to lock the indicator and for releasing the said operating member, and a releasing device adapted to release the indicator, when so locked, thereby permitting the indicator and operating member to return to their initial positions.

7. In a transmitter, the combination, with circuit-varying mechanism, having a revoluble operating member, a stationary dial, an indicator, a dial-wheel beneath the dial, but connected with the indicator, provided with means whereby it may be held in difierent positions, corresponding to the divisions of the dial, and having also means for arresting the operating member of such circuit-varying mechanism at different stages of its movement according to the position of the indicator, of locking means for holding said operating member in an initial position normally and for holding the dial-wheel in positions corresponding to the dial divisions, means for releasing the operating member from such initial position, and a releasing device adapted to release the dial-wheel when so held and permit the same and the operating member to return to their initial positions.

8. In a transmitter, the combination, with a toothed contact-wheel, a stationary brush therefor, and means for drivingsaid wheel, whereby, when the wheel rotates, a circuit is alternately made and broken, of a dial-wheel correspondingly toothed, a stationary dial, a pointer connected to the dial'wheel, a looking device adapted to hold the contact-Wheel normallyin an initial position, and to release the same and hold the dial-wheel when the pointer has been set, said dial-wheel and contact-wheel having corresponding and engaging projections whereby the-contact-wheel, when released, is arrested in a position corresponding to that to which the pointer has been set, and a releasing device adapted, when operated, to release the dial-wheel and contact-wheel and permit them to return to their initial positions.

9. In a transmitter, the combination, with circuit-varying mechanism having an operating member movable continuously forward in a prescribed path, and having no backward movement, means for driving such operating member, an indicator, and means operated thereby adapted to arrest the movement of the operating member at dilferent stages of the operation of the circuit-varying mechanism according to the position of the indicator, of a releasing device, adapted to support a telephone instrument, and operated to release said operating member by the replacing of such instrument.

10. In a transmitter, the combination, with circuit-varying mechanism having a revoluble operating member movable continuously forward and having no backward movement, means for driving such operating member, an indicator, and means operated thereby adapted to arrest the movement of the operating member at different stages of the operation of the circuit-varying mechanism according to the position of the indicator, of a releasing device, adapted to support a telephone instrument, and operated to release said operating member by the replacing of such instrument.

11. In a transmitter, the combination, with circuit-varying mechanism, having an operating member movable in a prescribed path, hand-operated power-storing mechanism for driving said operating member, an indicator provided with means whereby it may be held in different positions, and means operated by the indicator for arresting said operating member at di'lterent stages of its movement according to the position of the indicator, of a locking device for holding the indicator in predetermined positions in which it may be placed, means operated by said power-storing mechanism when power has been stored therein to the full extent, for causing said locking device to lock the indicator and for releasing the said operating member, and a releasing device adapted to support a telephone instrument, and to release the indicator if so locked, when such telephone instrument is placed upon it, thereby permitting the operating member and the indicator to return to their initial positions.

12. In a transmitter, the combination, with circuit-varying mechanism having a revoluble operating member, hand-operated powerstoring mechanism for driving said operating member, an indicator provided with means whereby it may be held in diiterent positions, and means operated by the indicator for arresting said operating member at different stages of its movement according to the position of the indicator, of a locking device for holding the indicator in predetermined positions in which it may be placed, means operated by said power-storing mechanism when power has been stored therein to the full extent, for causing said locking device to lock the indicator and for releasing the said operating device, and a releasing device adapted to support a telephone instrument, and to re lease the indicator if so locked, when such telephone instrument is placed upon it, thereby permitting the operating member and the indicator to return to their initial positions.

13. In a transmitter, the combination, with circuit-varying mechanism having a revoluble operating member, means for driving said member,andadial-wheel,engagingandadapt ed to arrest, or to be driven by, said operating member, but independently movable, of an escapement member adapted,when the parts are in normal position,to hold said operating memb'er stationary, and when in the opposite-post" "tion to release the operating member and hold the dial-wheel stationary,means for so movin g said escapement member, and a releasing device, adapted to-support a telephone instrument, and to operate said escapement memcapement'member and release the dial-wheel.

ber, and arranged when such telephone instrument is placed upon it, to operate the es? 14. In a transmitter, the combination, with circuit-varying mechanism having a revoluble operating member, power-storing means for drivingv said member, and a'dial-wheel, engaging and adapted to arrest, or be driven by,

, said operating member, but independently movable, of an escapement-lever adapted,

when the parts are in normal position, to hold saidoperating member stationary, and when in the opposite position to release the operating member and holdthe dial-wheel stationary','said power-storing mechanism being ar-- ranged to operatesaid escapement-lever-and 0 release said operating member when power has been stored in such mechanism to the full extent, and a releasing device, adapted to support'a telephone -instrument, and to operate 7 placed upon it.

Y circuit-varying mechanism having arevolue 4o ble operating member,aspringfor driving said said escapement-lever, andarranged to operate the escapement-lever and release the dialwheel when said .telephone. instrument is 15.- In a transmitter, the combination, with member, a hand-operated member for winding up said, spring, and a dial-wheel, engag- 7, ing and adapted to arrest, or to be driven by, said operating. member, but independently movable, of an escapement-lever adapted,

when the parts are in normal'position, to hold said operating member stationary, and when l in the opposite positiontorelease the operatmg member and hold the dial-wheel stationary, said spring-winding member being arrangedto operate said, escapement-lever and release the operating member,when the spring has acquired full tension, and a'releasing device, adapted to support a telephone instrument, and to operatesaid escapement-lever, and, arranged to operate the escapement-lever and release the dial-wheelwhensaid telephone instrument is placed upon it.

' 16; In a transmitter, the combinatiom-with circuit-varying mechanism having a rotary contact-wheel, a brush adapted to contact therewith,and a spring for rotatingsaid wheel,

a dial-wheel mounted concentrically with re:- spect to saidcontact- Wheel, engaging the same, and adapted to arrest,.or be driven by, said contact-wheel, and means forwinding up said spring,"of anescapement member'adapt ed, when the parts are in normal position, to

hold said contact-wheel stationary, andwhen in the opposite position to; release said contact-wheel and hold the'dial-"wheel stationary, means for so operating said escapement-lever,

and a receiver-support, inovably mounted'and sprin -supported, and adapted to operate the escapement-lever and release the'dial-wheel when the receiver is' placed uponit. Y

17. In a transmitter, the combinatiomwith ble operating member, a, spring" for driving said member, a hand-operatedimeniber for circuitvarying mechanism having a revoluby, said operating memberfbut independently movable, of an escapement member which,when the parts are in normal position,

holds said operating member stationary, and

which when in its opposite :positionmeleases the operating member and hold's the dialwheel stationary,ineans tending to movethe S a escapement member'to :su'ch opposite position, a releasing-lever, asprin g tripping-piece carried thereby and adapted to engage a hooked portion of the escapement member,

said tripping-piece bein g bent when the parts are in normal position, but being adapted, upon the movement ofv the releasing-lever,

whenthe dial-wheel is locked, to engage said Y escapement member andymove the same into position to'release the dial-wheel andlengage' and arrest the operating member -ofthe; circuit-varying mechanism upon the. return of thelatter toitsinitial positiontand the'springa winding member beingadapted, when oper atedwith the parts in normal position, to em gage the escapement member and operate the same to release said spring tripping piece from engagement-with the escapement memher and so -to permit such trippingpiece to spring outward, thereby permitting the es:

capement I member to release the operating memberof the circuit-varying mechanism and to engage-the 'dial-wheel.-

18; In a;transmitter,the combination,.wi th signaLtransmitting mechanism, and adetent;

device adapted to hold such mechanism from returning to normal condition after the trans mission of a signal,of a releasingdevice,- and atripping-piece,interposedzbetwe'en said detent and-releasing-devices, carried by one of said devices, and adapted toengage the other,

too

said tripping-piece being'under stress tend-1 ing'to move it out ofsuch-engagement when so in engagement andwhen the signal-transmitting mechanism and the detent and" re leasing devices are in 'normalpositions, and

being adapted to ,operatethe detentdevice,

and release the signal-transmitting mechanvice after thetransmission of a'signalr- A 19; In a transmittenthe co-mbination,with

signaltransmitting mechanism comprising circuit-varying mechanism, an'i-ndicatorand means operated thereby adapted-t0 arrest the ism upon the operation of the releasing-deoperation of the circuit-varyingmechanismst winding upsaid spring,"anda-IdiaLWheeL'eH-I 1 gaging and adapted to arrest, or to be driven at intermediate stages of its operation, according to the position of said indicator, power-storing mechanism for operating said signal-transmitting mechanism, and a detent device normally holding the signal-transmitting mechanism against operation and adapted to hold such mechanism from returning to normal condition after the transmission of a signal, of a releasing device, a trippingpiece interposed between said detent and releasing devices, and adapted, upon operation of the releasing device, after the transmission of a signal, to operate the detent device and thereby to release the signal-transmitting mechanism and permit the same to return to normal condition, and means for operating the detent and causing the same to release the signal-transmitting mechanism when the power-storing mechanism has stored full power.

20. In a transmitter, the combination, with signal-transmitting mechanism, and adetent device adapted to holdsuch mechanism from returning to normal condition after the transmission of a signal, of a receiver-support, movably mounted and provided with means for elevating it upon the removal of a receiver therefrom, a tripping-piece interposed between said detent and receiver-support, carried by one of said devices and adapted to engage the other, said tripping-piece being under stress tending to move it out of such engagement when so in engagement and when the signal-transmitting mechanism and the detent and receiver-support are in normal positions, and being adapted to operate the detent device and release the signal-transmitting mechanism upon the depression of the receiver-support after the transmission of a signal.

:31. In a transmitter, the combination, with signal-transmitting mechanism comprising circuit-varying mechanism, an indicator and means operated thereby adapt-ed to arrest the operation of the circuit-varying mechanism at intermediate stages of its operation, according to the position of said indicator, power-storing mechanism for operating said signal-transmitting mechanism, and a detent device normally holding the signal-transmitting mechanism against operation, and adapted to hold such mechanism from returning to normal condition after the transmission of a signal, of a receiver-support, a trippingpieceinterposed between said detent and said receiver-support, and adapted, upon depression of the receiver-support, after the transmission of a signal, to operate the detent and thereby to release the signal-transmitting mechanism and to permit the same to return to normal condition, and means for operatin g the detent and causing the same to release the signal-transmitting mechanism when the power-storing mechanism has stored full power.

22. In a transmitter, the combination, with signal-transmitting mechanism comprising circuit-varying mechanism, an indicator and means operated thereby adapted to arrest the operation of the circuit-varying mechanism at intermediate stages of its operation, according to the position of said indicator, power-storing mechanism for operating said signal-transmitting mechanism, and a detent device normally holding the signal-transmitting mechanism against operation and provided with means tending to cause it to release said mechanism, said detent device being adapted likewise to hold such signal-transmitting mechanism against return to normal condition after transmission of a signal, ofa receiver-support, movably mounted and providedwith means for elevating it upon the removallof the receiver therefrom, a trippingpiece interposed between the receiver-support and detent, and normally preventing release of the signal-transmitting mechanism by the detent, and means for operating the detent and releasing the signal-transmitting mechanism when full power has been stored in said power-storing mechanism; said tripping-piece being adapted, upon depression of the receiver-support after the transmission of a signal to operate the detent and permit such signal-transmitting mechanism to return to normal condition.

23. In a transmitter, the combination, with signal-transmitting mechanism, power-storing mechanism for operating the same, and a detent device normally holding the signaltransmitting mechanism against operation and provided with means tending to cause it to release said mechanism, said detent device being likewise adapted to hold such signaltransmitting mechanism against return to normal condition after transmission of a signal, of a receiver-support, movably mounted and provided with means for elevating it upon removal of a receiver therefrom, a trippingpiece interposed between said receiver-support and said detent, operatively connected to one of said devices and adapted to engage the other, said tripping-piece being under stress tending to move it out of such engagement when so in engagement and when the signal-transmitting mechanism and the detent and receiver-support are in normal positions, and being adapted, when the parts are in such positions, to prevent release of the signal transmitting mechanism; and means for releasing such tripping device and causing the detent to release the signal-transmitting mechanism when full power has been stored in said power-storin g mechanism; said tripping-piece being arranged to operate the detent upon depression of the receiver-support after transmission of a signal, and thereby to release the signal-transmitting mechanism and to permit the same to return to normal condition.

2a. In a transmitter, the combination, with circuit-varying mechanism adapted to transmit a plurality of signals, an adj ustable arresting device, adapted to arrest the operation of the circuit-varying mechanism in ac tion,said detent device being likewise adapted when in opposite position to release the circuit-varying mechanism and to hold the arresting device against further adjustment, of a releasing device, a tripping-piece interposed between said releasing device and said detent device, secured to one of said devices, and adapted to engage the other, and which is under stress tending to cause it to move out of such engagement when in such engagement and when the releasing and detent devices are in normal position, and means for operating the detent device to permit the transmission of a signal; said tripping-piece being adapted, upon operation of the releasing device after transmission of a signal, to

- operate the detent and release the circuitanism for operating the same, an adjustable arresting device, adapted to arrest the operation of the circuit-varying mechanism in accordance with the signals to be sent, and a detent device adapted in, normal position tlo hold the circuit-varying'Inechanism in normal position, or to arrest such circuit-varying mechanism upon its return tenor-ma l position, said detent device beinglikewise. adapted Whenin the opposite position to re-,

lease the circuit-varying mechanism and to hold the arresting device against further adjustment, of a releasing device, a trippingpiece interposed between said releasing de-' vice'and said tripping device, secured to one of said devices, and adapted to engage the other, and which is under stress tending to cause it to move outof such engagement when in such engagement and when the releasing and detent devices arein no'rmalposition, and means for operating the detent device and causing it to release the circuitvarying mechanism and lock the arresting device, when the power-storing mechanism has stored full power; ,saidtripping-piece being adapted, upon operation of the releasing device after the transmission of asignal, to operate the'detent and release the circuitvarying mechanism.

In testimony whereof I a fiix my signature 

